Glad you found a solution

The master retains whatever the settings was at creation (1 or 2 pages) even if you change the document settings afterwards (Facing Pages), a solution is to create a new master page using only one page then replace the pages you wish to change with the new master.

Hope this helps

This occurred to me last month, even changing workspaces did nothing, the only solution I found was to trash my preferences.

Maybe somebody else has found another solution.

This might be related, we came across a similar problem with Microsoft products and Adobe when copying and pasting information. It seems that Microsoft insist on using the language setting of the computer to set its numbers, Adobe does not. In my case our Macintosh was running the French system so all numbers were treated as 1000,00$ but American is $1,000.00, so we finally figured out that we had to change the language of the computer to “English US” in order for things to work. But since we are bilingual and work with both languages we are often changing the settings back and forth.

Hope this helps.

Insert or Place? You cannot edit Placed (cmd+D) InDesign and PDF but Word and text files should work

According to this ASCII table: 32 is a normal space, 255 is the non-breaking space
https://www.theasciicode.com.ar/extended-ascii-code/non-breaking-space-no-break-space-ascii-code-255.html

Hope it helps

I see an answer here that might help: https://forums.adobe.com/thread/588551

I believe this is a new feature since InDesign CC 2014